Operating Instructions - CPA2501
63
Air Data Test Indicator
CPA2501
8.5.3 External Calibration Procedures
To calibrate the internal transducers or the barometric reference remotely, use the same setup described
in section 10 of this manual. The only difference is that the interface with the transducer is through the
software provided and a PC, not directly through the instrument.
8.5.3.1 Transducer Removal
To remove the internal transducer set (Ps/Qc or Ps/Pt), first remove the three slotted screws holding the
top panel of the chassis, then remove the top panel. This will reveal the transducer. The transducer can
be removed by unplugging the ribbon cables from the transducer, loosening the thumb screw and lifting
the transducer out of the chassis.
Figure 8.5.3.1 - Transducer Removal
8.5.3.2 Barometric Reference Removal
To remove the optional Barometric reference, first remove three screws holding the top panel of the
chassis, then remove the top panel. This will reveal the barometer, Figure 8.5.3.2. The barometric
reference can be removed by removing the attached hose, loosening the thumb screw, and lifting the
barometric reference out of the chassis.
!
CAUTION: ESD protection is required when performing this operation.
Figure 8.5.3.2 - Internal Barometric Reference
Thumb
Screw
Thumb
Screw